Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Uncertainty Analysis of Improved Speed Performance of a Ship with an Air-Lubrication System in a Sea Trial

공기윤활시스템 적용 선박의 시운전 속도성능에 대한 불확실성 해석

  • Seo, Dae-Won (Department of Naval Architecture and Ocean Engineering, Kunsan National University) ;
  • Oh, Jungkeun (Department of Naval Architecture and Ocean Engineering, Kunsan National University)
  • 서대원 (군산대학교 조선해양공학과) ;
  • 오정근 (군산대학교 조선해양공학과)
  • Received : 2020.10.20
  • Accepted : 2020.11.19
  • Published : 2020.12.31
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Abstract

A sea trial of the speed performance test is the one of the most important means of verifying a ship's performance, and the International Organization for Standardization established a standard for this test in 2015. Environmental disturbances such as wind and waves are always present under real sea conditions, however, so it is impossible to accurately estimate delivered horsepower under ideal conditions. These disruptive influences also make it difficult to evaluate the positive effect of recently developed energy-saving devices. In this study, uncertainty analysis of improved speed performance was carried out using Monte Carlo simulation to confirm the energy-saving efficiency of a ship equipped with an air-lubrication system. The findings showed the average power saving to be 3.2%, with the expanded uncertainty of ± 2.7% at a 95% confidence level (k=2).

선박의 해상 시운전 중 속도성능시험은 선박의 속도를 입증하기 위한 중요한 시험항목 중 하나이다. 국제표준화기구에서는 2015년 시운전 속도성능시험에 관한 표준 가이드라인을 제정한 바 있다. 일반적인 해상상태에서는 바람과 파도등 환경적 외란의 영향이 언제나 존재하므로, 정확한 전달동력을 추정하기란 불가능 하다. 또한 외란의 영향으로 최근 개발되고 있는 에너지 절감장치의 개선효과를 정확히 평가하는 것도 쉽지 않다. 본 연구에서는 몬테카를로 시뮬레이션을 이용하여 공기윤활시스템을 장착한 선박의 동력 절감량에 관한 불확실성 해석을 수행하였다. 그 결과 공기윤활시스템 가동으로 3.2%의 동력이 절감되었으며, 절감된 동력의 확장불확도는 95% 신뢰수준 (k = 2)에서 약 ± 2.7 % 범위를 갖는 것으로 나타났다.

Keywords

Acknowledgement

본 논문은 2020학년도 군산대학교 신임교수 연구비 지원 및 교육부와 한국연구재단의 재원으로 수행된 사회맞춤형 산학협력 선도대학(LINC+) 육성사업의 지원으로 연구되었습니다.

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